Halloween Monster Cookies are the recipe that Teresa makes every most enthusiastically anticipated Halloween and every most playfully creative individual October gathering when she wants to create the most completely extraordinary and the most genuinely beloved individual Halloween cookie that captures the most specific and the most deeply beloved individual monster individual aesthetic — the most wildly adorned and the most properly googly-eyed individual monster face with the most dramatically colorful and the most abundantly scattered individual Halloween candies — in the most brilliantly designed and the most properly hearty individual oat-and-peanut-butter individual monster cookie format that delivers the most substantially satisfying and the most genuinely nourishing individual Halloween individual treat experience through the most rolled-oat base and the most protein-rich individual peanut butter that most uniquely characterizes the most authentic individual monster cookie formula.
Halloween Monster Cookies are the most easy and deeply extraordinary 30-minute Halloween individual oat peanut butter M&M monster cookies made by creaming butter peanut butter and sugars adding eggs vanilla and baking soda folding oats Halloween M&Ms dark chips and googly candy eyes baking at 350°F for 10 to 12 minutes. Come follow us on Pinterest where we share beautiful Halloween recipes and easy holiday favorites from our kitchen every single week.
Table of Contents
Why You Will Love This Halloween Monster Cookies Recipe

This Halloween Monster Cookies recipe is the most completely extraordinary and the most genuinely beloved individual Halloween cookie that uses the most authentically monster-cookie individual oat-and-peanut-butter individual formula — the most specifically flourless and the most properly hearty individual rolled oat base with the most protein-rich individual peanut butter that produces the most substantially satisfying and the most uniquely textured individual Halloween cookie — decorated with the most dramatically goggle-eyed individual candy eyes and the most abundantly scattered individual Halloween M&Ms for the most completely monster-themed and the most genuinely playful individual Halloween cookie.
The most authentically monster-cookie individual formula — no individual flour, only the most rolled individual oats as the most structural base — produces the most genuinely distinctive and the most properly chewy individual oat-and-peanut-butter individual texture that is the most characteristically monster-cookie individual and the most immediately recognizable as the most distinctly different from every most conventional individual flour-based individual cookie alternative. Our Easy Peanut Butter Cookies make a beautifully equally peanut butter and equally Halloween-transformable companion for a complete and wonderful Halloween peanut butter cookie collection.
Ingredients Needed for This Halloween Monster Cookies Recipe
- ½ cup Unsalted Butter, softened
- ½ cup Smooth Peanut Butter (no-stir variety)
- ¾ cup Packed Brown Sugar
- ¼ cup Granulated Sugar
- 2 large Eggs, room temperature
- 1 tsp Pure Vanilla Extract
- 1 tsp Baking Soda
- 3 cups Old-Fashioned Rolled Oats
- 1 cup Halloween M&Ms (orange and black), divided
- ½ cup Dark Chocolate Chips or Black Chocolate Chips
- Large Candy Eyes (individual bags available at craft stores), plus small candy eyes
- Halloween Pumpkin and Ghost Sprinkles
- Orange Icing or Candy Melts for the most monster individual mouth detail (optional)
How to Make This Halloween Monster Cookies Recipe
Preheat the oven to 350°F (175°C). Line baking sheets with parchment paper.
In a large bowl, beat the softened butter, peanut butter, brown sugar, and granulated sugar together until the most light and the most creamy — approximately 2 minutes. Add the eggs, vanilla extract, and baking soda, mixing until the most well combined, cara mia.
Add the rolled oats and mix until the most evenly incorporated. The individual dough will be the most thick and the most hearty from the most substantial individual oat content.
Fold in three-quarters cup of the most individual Halloween M&Ms and the most dark chocolate chips.
Using a large cookie scoop or quarter-cup measure, drop the most generous individual portions onto the prepared baking sheets spacing 3 inches apart — these individual monster cookies spread the most significantly during baking. Press the most additional individual Halloween M&Ms, the most individual candy eyes in the most dramatically googly-eyed individual monster arrangement, and the most individual Halloween sprinkles over the most top surface of each individual portion.
Bake at 350°F for 10 to 12 minutes until the most edges are the most set and the most golden and the most centers appear the most still slightly soft. Cool on the baking sheet for 5 minutes.
How to Serve This Halloween Monster Cookies Recipe
Serve at room temperature for the most beautifully set and the most properly chewy individual oat-and-peanut-butter individual monster cookie texture. The most individually googly-eyed individual candy eye decoration is the most dramatically charming and the most properly monster-like at room temperature when the most individual candy eye positioning is the most clearly visible and the most properly defined.
For the most completely extraordinary individual Halloween monster party presentation, arrange individual Halloween monster cookies on a green individual serving platter with the most individual candy eyes and the most individual Halloween M&Ms scattered across the most individual serving surface for the most completely monsters-have-escaped individual Halloween party cookie display. Our Easy Peanut Butter Cookies make a beautifully equally peanut butter and equally playfully decorated companion for a complete and wonderful Halloween peanut butter cookie collection.
How to Store This Halloween Monster Cookies Recipe
Store in an airtight container at room temperature for up to 5 days. The most rolled individual oat and the most individual peanut butter individual base maintains the most beautifully chewy and the most properly hearty individual monster cookie texture throughout the most entire storage period. The most individual candy eyes and the most individual Halloween M&Ms maintain the most vibrant individual colors throughout storage.
Tips to Make This Halloween Monster Cookies Recipe

Arrange the most individual candy eyes in the most dramatically varied and the most playfully individual monster-like individual positions — some individual eyes the most straight forward, some the most dramatically crossed, some the most one-up-one-down — for the most genuinely charming and the most individually varied individual monster personality collection across the most entire individual platter of Halloween monster cookies.
These individual monster cookies spread the most significantly during baking — use a large individual cookie scoop or quarter-cup individual measure and space the most individual portions at least 3 inches apart for the most proper individual room for the most spreading individual monster cookie to expand without the most connecting to the most adjacent individual cookie.
Helpful Notes for This Halloween Monster Cookies Recipe
The most authentic individual monster cookie formula uses no individual flour — only the most rolled individual oats as the most structural individual base. The most individual oats provide the most hearty and the most distinctively textured individual chew that makes the most authentic individual monster cookie so genuinely extraordinary and the most characteristically different from every most flour-based individual cookie alternative.
For the most dramatically monster-like individual candy eye effect, use the most large individual jumbo candy eyes — approximately half-inch individual diameter — rather than the most miniature individual candy eyes for the most genuinely googly-eyed and the most properly Halloween-appropriate individual monster individual expression on every individual Halloween monster cookie.
Variation of This Halloween Monster Cookies Recipe
Maria made a version adding half a cup of the most orange-tinted individual candy corn alongside the most individual Halloween M&Ms and the most individual dark chips for the most completely extraordinary and the most properly triple-Halloween-candy individual monster cookie. Teresa tried a mummy monster version — drizzling white individual candy melt in the most thin horizontal lines over each most individual cooled cookie and pressing individual small candy eyes between the most individual white drizzle lines — for the most completely extraordinary and the most adorably Halloween mummy monster individual cookie.
For a green monster version, add three drops of green gel food coloring to the most individual monster cookie dough and use the most individually green M&Ms and the most green candy eyes for the most completely extraordinary and the most properly green-monster-themed individual Halloween monster cookie. Our Cookie Monster Cookies make a beautifully equally individually themed and equally monster-eyed companion for a complete and wonderful Halloween monster cookie collection.
FAQs About This Halloween Monster Cookies Recipe
What makes these authentic monster cookies?
The most authentically monster-cookie individual formula uses no individual flour — only the most rolled individual oats as the most structural individual base — combined with the most peanut butter and the most abundant individual candy mix-ins that together create the most characteristically hearty and the most distinctively chewy individual monster cookie texture that every most knowledgeable individual monster-cookie enthusiast immediately recognizes. The most individual oat base produces the most substantially satisfying individual texture that is the most genuinely different from every most flour-based individual Halloween cookie alternative.
How many candy eyes should go on each cookie?
The most traditionally monstrous individual Halloween monster cookie features 2 to 3 the most dramatically placed individual candy eyes arranged in the most individually varied and the most playfully googly-eyed individual monster-face individual pattern. Using the most large individual jumbo candy eyes for the most central individual monster eyes and adding the most one or two most individual small candy eyes in the most dramatically off-position placements creates the most genuinely extraordinary and the most properly Halloween-monstrous individual expression.
Why don’t these use flour?
The most authentic individual monster cookie formula omits individual flour entirely in favor of the most hearty individual rolled oats as the most structural base — the most individual oats provide the most sufficient individual structure for the most properly shaped individual monster cookie while contributing the most characteristically hearty and the most distinctively chewy individual oat individual texture that defines the most authentic individual monster cookie individual eating experience.
Conclusion
These Halloween Monster Cookies are the most completely extraordinary and the most genuinely playful oat peanut butter individual Halloween cookies that make every Halloween gathering and every October occasion feel genuinely and completely spooky and special through the most hearty oat peanut butter base and the most vibrant Halloween M&Ms and the most dramatically googly-eyed candy eyes and the most charming Halloween sprinkles in every single monstrously individual and completely irresistible Halloween monster cookie.
We hope they bring the same deeply joyful Halloween monster cookie magic and the same completely delighted Halloween party to your kitchen that they have always brought to ours. Make them, share them, and come back to tell us all about it. With all our love, Maria, Lucia, and Teresa.
Print
Halloween Monster Cookies The Most Easy Oat Peanut Butter Halloween M&M Dark Chip Candy Eye Googly Sprinkle Individual Monster Cookie
- Total Time: 25 minutes
- Yield: 16 to 18 large cookies 1x
Description
The most extraordinary Halloween Monster Cookies made by preheating oven to 350°F lining baking sheets beating 1/2 cup softened butter 1/2 cup smooth peanut butter 3/4 cup packed brown sugar and 1/4 cup granulated sugar until light and creamy 2 minutes adding 2 room temperature eggs 1 tsp vanilla and 1 tsp baking soda mixing combined adding 3 cups rolled oats mixing evenly incorporated dough will be thick folding 3/4 cup Halloween M&Ms and 1/2 cup dark chips scooping large portions or 1/4 cup measures 3 inches apart pressing remaining Halloween M&Ms candy eyes in googly-eyed monster arrangement and Halloween sprinkles over tops baking 350°F 10 to 12 minutes until edges set and golden and centers still slightly soft cooling 5 minutes on sheet then rack. A completely perfect flourless oat peanut butter butter sugar Halloween M&M dark chip candy eye monster cookie recipe.
Ingredients
1/2 cup Unsalted Butter softened
1/2 cup Smooth Peanut Butter no-stir variety
3/4 cup Packed Brown Sugar
1/4 cup Granulated Sugar
2 large Eggs room temperature
1 tsp Pure Vanilla Extract
1 tsp Baking Soda
3 cups Old-Fashioned Rolled Oats
1 cup Halloween M&Ms orange and black divided
1/2 cup Dark or Black Chocolate Chips
Large and Small Candy Eyes
Halloween Pumpkin and Ghost Sprinkles
Orange Icing optional for monster mouth
Instructions
1. Preheat oven to 350°F 175°C. Line baking sheets.
2. Beat softened butter, peanut butter, brown sugar, and granulated sugar until light and creamy 2 minutes.
3. Add eggs, vanilla, and baking soda. Mix combined.
4. Add rolled oats. Mix evenly incorporated. Dough will be thick.
5. Fold 3/4 cup Halloween M&Ms and dark chips.
6. Scoop large portions or 1/4 cup measures 3 inches apart.
7. Press remaining M&Ms, candy eyes in googly-eyed arrangement, and sprinkles over tops.
8. Bake 350°F 10 to 12 minutes until edges set and centers slightly soft.
9. Cool 5 minutes on sheet. Transfer to rack.
- Prep Time: 10 minutes
- Cook Time: 12 minutes
- Category: Dessert, Cookies, Halloween, Holiday
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 cookie
- Calories: 295
- Sugar: 22g
- Sodium: 145mg
- Fat: 14g
- Saturated Fat: 6g
- Unsaturated Fat: 7g
- Trans Fat: 0g
- Carbohydrates: 38g
- Fiber: 3g
- Protein: 6g
- Cholesterol: 38mg
Keywords: Halloween monster cookies, easy oat peanut butter Halloween monster cookies recipe M&M dark chip candy eye googly sprinkle, best Halloween monster cookies flourless oat, flourless oat peanut butter Halloween M&M dark chip candy eye googly monster cookie
- Apple Pie Truffles The Most Easy No-Bake Caramel Apple Butter Cinnamon Graham Cracker Cream Cheese White Chocolate Individual Fall Truffle - October 14, 2026
- Browned Butter Pecan Cheesecake The Most Easy Baked Brown Butter Pecan Graham Crust Cream Cheese Sour Cream Caramel Pecan Topping - October 4, 2026
- Apple Cider Donut Cake Recipe Easy Layer Brown Butter Spice - September 29, 2026


